Industrial truck



Oct. 23,1923. 1,471,709

W. SCHROEDER, JR

INDUSTRIAL TRUCK Original Filed Sent. 17. 1921 2 Sheets-Sheet 1 INVENTORA TTORNEYS WITNE88 I l I Y W. SCHRQEDER, JR

INDUSTRIAL TRUCK Original Filed Sept. 17 1921 2 Sheets-Sheet 2 19INN/11198;)"

ATTORNEYS Patented Oct. 23, 19230 WILLIAM SCHROEDER, JR.,

OF BROOKLYN, NEW YORK.

INDUSTRIAL rnuox.

Original application filed September 17, 1921, Serial No. 501,287.Divided and this application filed June 29, 1922. Serial No. 571,643.

had to the accompanying drawings forming W a part hereof.

The resent application constitutes a division of application Ser. No.501,287, filed by the present applicant on September 17, 1921.

The principal object of the present invention isto provide in anindustrial truck'of the elevating platform type a novel support for theplatform by means ofwhich load shocks are absorbed. More particularly,the invention has to do with an industrial truck of the characterindicated in which the platform is supported through a cantileversuspension. In thisv type of suspension it is well known that loadshocks are multiplied tremendously and subject the supporting frame andtrackways to such severe stresses as will materially shorten the lifeand usefulness of the truck. In accordance with the present invention itis proposed to relieve this condition to the greatest degree possible bymounting the platform yieldingly on the supporting frame and interposingbetween the frame and platform shock absorbing elements such as springs.

A further object of the invention is to construct a platform whichwill'lend itself to the'improved means of support by a constructionwhich shall be simple and inexpensive and thoroughly practical tomanufacture.

Other objects and advantages of the invention will appear with greaterparticularity hereinafter in connection with the detailed description ofthe illustrated embodiment shown in the drawings wherein:

Figure l is a view in side elevation of an improved industrial truck inwhich the improvements are incorporated, a portion of the platform beingbroken away to show the yielding support therefor.

Figure 2 is a view in plan of the truck shown in Figure 1.

While the invention is not to be limited to the details of constructionof the truck chassis and the means employed'in supporting the platformone suitable type of truck is illustrated by Way of example in thedrawings. As there shown, the chassis of the truck. includeslongitudinally extending side frame members a at each side to supportthe vertical tracks I; in which move the rollers of the supportingcarriage for the frame on which the load platform 6 is supported. Ahoisting motor f for the frame d is indicated in the drawings al thoughthe invention is not limited to the use of power for elevating theplatform nor, indeed, to a cantilever suspension therefor although the,.present improvements will be of particular advantage in a truck havingsuch elements.

In the cantilever suspension illustrated it will be evident thatstresses imposed on any part of the chassis will be transmitted to theplatform and multiplied to such a substantial degree as to react to adisadvantageous extent on all of the elements by which the platform iscarried. The problem presented is to resist and absorb these stressesbefore they are impressed fully upon the load platform e. To relieve thecondition to the greatest degree possible it is proposed to mount theplatform e on the frame 03 yieldingly. To this end, the frame may havecast therein spring seats in which are carried springs g on which theplatform 0 rests. This platform is preferably made from pressed metaland has its end e upturned to conform to the frame (Z. The line of bendindicated roughly at a will permit sufiicient flexion for the platform 6to accommodate itself to a shock absorbing yielding support although itis obvious that this platform might be hingedly secured to the frame 15adjacent its front edge. In either event. load shocks on the cantileversupport will be absorbed to a great degree and the strain and stressescorrespondingly diminished.

The parts described, it will be observed are simple and inexpensive tomanufacture, easy to assemble and thoroughly efiicient in use, providinga desirable degree of flexibility and absorption of destructivestresses. Changes in details of construction may be made withoutdeparting from the spirit of the invention provided the modificationsfall within the scope of the appended claims. What I claim is:

1. In an industrial truck, a platform, a cantilever support therefor andmeans to mount the platform yieldingly on the cantilever support.

2. In an industrial truck, a platform, a. cantilever support thereforand means to mount the platform yieldingly.

8. in an industrial truck in combination with vertical treckweys,rollers running therein, a. cantilever frame carried with the rollers, aplatform mounted on the cantilever frame adapted to flex adjacent'itsinner edge and springs interposed between the frame and the platform tosupport the latter vieldingly.

This specification signed this 28th day of June A. 1922.

WILLIAM SGHFLQEDER, J

